Comunidad Steam :: Captura :: Send Old Longfellow to enter a Power Armor frame then give him to equip the Rescue Diver Suit and you get yuor own alien companion.
FO4] Diving Suit Power Armor : r/FalloutMods
Fallout 4' Diving Suit XPS ONLY!!! by lezisell on DeviantArt
Hazmat suit (Fallout 4) | Fallout Wiki | Fandom
Cave diving suit | Fallout Wiki | Fandom
Deep Sea Diving Suit by valentinwinkelmann on DeviantArt